1. Forensic Identification Research Services, Royal Canadian Mounted Police, Ottawa, Ontario K1A 0R2 CA.
2. School of Mathematics and Statistics, Carleton University, Ottawa, Ontario K1S 5B6 CA.
3. Business Survey Methods Division, Statistics Canada, Ottawa, Ontario K1S 1A1 CA.
4. Department of Orthopaedics, Mt. Sinai Hospital, Toronto, Ontario M5G 1X5 CA.